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@ARTICLE{He:826084,
author = {He, W. and Mauer, G. and Gindrat, M. and Wäger, R. and
Vassen, Robert},
title = {{I}nvestigations on the {N}ature of {C}eramic {D}eposits in
{P}lasma {S}pray–{P}hysical {V}apor {D}eposition},
journal = {Journal of thermal spray technology},
volume = {26},
number = {1-2},
issn = {1544-1016},
address = {Boston, Mass.},
publisher = {Springer},
reportid = {FZJ-2017-00344},
pages = {83 - 92},
year = {2017},
abstract = {In Plasma Spray–Physical Vapor Deposition (PS-PVD)
process, major fractions of the feedstock powder can be
evaporated so that coatings are deposited mainly from the
vapor phase. In this work, Computational Fluid Dynamics
(CFD) results indicate that such evaporation occurs
significantly in the plasma torch nozzle and even nucleation
and condensation of zirconia is highly possible there.
Experimental work has been performed to investigate the
nature of the deposits in the PS-PVD process, in particular
coatings from condensate vapor and nano-sized clusters
produced at two spraying distances of 1000 mm and 400 mm. At
long spraying distance, columns in the coatings have
pyramidal tops and very sharp faceted microstructures. When
the spraying distance is reduced to 400 mm, the tops of
columns become relatively flat and a faceted structure is
not recognizable. XRD patterns show obvious preferred
orientations of (110) and (002) in the coatings sprayed at
400 mm but only limited texture in the coatings sprayed at
1000 mm. Meanwhile, a non-line of sight coating was also
investigated, which gives an example for pure vapor
deposition. Based on these analyses, a vapor and cluster
depositions are suggested to further explain the formation
mechanisms of high-quality columnar-structured PS-PVD
thermal barrier coatings which have already shown excellent
performance in cyclic lifetime test.},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113) / HITEC - Helmholtz Interdisciplinary Doctoral
Training in Energy and Climate Research (HITEC)
(HITEC-20170406)},
pid = {G:(DE-HGF)POF3-113 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000392060300008},
doi = {10.1007/s11666-016-0513-6},
url = {https://juser.fz-juelich.de/record/826084},
}